BAV19-TAP Equivalent & Substitute Parts

Part Overview

The BAV19-TAP is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates at 100 V DC reverse voltage with 250 mA average rectified current and features fast recovery characteristics with a 50 ns reverse recovery time. The device is housed in a DO-204AH (DO-35) axial package and is qualified to AEC-Q101 automotive standards. The BAV19-TAP maintains active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific requirements.

Substiute Parts

BAV19-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 927BAV19-TAP Datasheet

Current PartRFQ

BAV19TR

Fairchild SemiconductorIn Stock: 10472BAV19TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAV19-TAP with the BAV19TR is determined by compatibility across the following critical parameters:

Mechanical Compatibility: Both devices utilize the DO-204AH (DO-35) axial through-hole package, ensuring identical physical dimensions and mounting characteristics.

Electrical Performance Envelope: The BAV19TR operates at 120 V DC reverse voltage, which exceeds the BAV19-TAP specification of 100 V, providing margin for voltage stress. The BAV19TR supports 200 mA average rectified current, which is lower than the BAV19-TAP rating of 250 mA. This relationship establishes the BAV19TR as suitable for applications where the circuit voltage does not exceed 100 V and current demand does not exceed 200 mA.

Recovery Characteristics: Both devices share identical 50 ns reverse recovery time specifications, maintaining equivalent switching performance.

Leakage Current: Both devices specify 100 nA reverse leakage current at 100 V, ensuring comparable DC blocking characteristics.

Temperature Rating: Both devices are rated to 175°C maximum junction temperature, providing equivalent thermal performance.

Product Status: Both devices maintain active product status, confirming ongoing manufacturing and availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Application Suitability: The BAV19-TAP is the specified component and should be used when circuit requirements demand 250 mA average rectified current at 100 V DC reverse voltage.

Substitution Conditions: The BAV19TR (Fairchild Semiconductor) is an acceptable substitute when the following conditions are met:

1. Circuit maximum reverse voltage does not exceed 100 V
2. Circuit maximum average rectified current does not exceed 200 mA
3. Forward voltage drop increase from 1 V to 1.25 V at the operating current point is acceptable to circuit design
4. Higher capacitance (5 pF versus 1.5 pF) does not adversely affect circuit performance
5. Through-hole axial package mounting is required

Compliance Considerations: The BAV19-TAP carries AEC-Q101 automotive qualification and RoHS3 compliance. The BAV19TR specifications do not indicate automotive qualification status in the provided data. Applications requiring automotive-grade components should retain the BAV19-TAP.

Inventory and Supply: The BAV19TR is available in significantly higher inventory (10,400 pcs) compared to the BAV19-TAP (840 pcs), making it suitable for high-volume production scenarios where current demand does not exceed 200 mA.

Frequently Asked Questions (FAQ)

Q: Can the BAV19TR directly replace the BAV19-TAP in all applications?

A: No. The BAV19TR is suitable only for applications where average rectified current does not exceed 200 mA. If the circuit requires the full 250 mA rating of the BAV19-TAP, the BAV19TR is not appropriate.

Q: What is the significance of the voltage rating difference (100 V versus 120 V)?

A: The BAV19TR 120 V rating exceeds the BAV19-TAP 100 V rating. This means the BAV19TR can be used in any circuit designed for the BAV19-TAP without voltage stress concerns. However, the BAV19-TAP cannot substitute for the BAV19TR in circuits requiring 120 V operation.

Q: How does the forward voltage difference affect circuit design?

A: The BAV19TR exhibits 1.25 V forward voltage at 200 mA compared to 1 V at 100 mA for the BAV19-TAP. In rectifier circuits, this 0.25 V difference may affect output voltage regulation and power dissipation. Circuit analysis is required to confirm acceptability.

Q: Are the packages physically identical?

A: Yes. Both devices use the DO-204AH (DO-35) axial through-hole package with identical physical dimensions, allowing direct mechanical substitution on printed circuit boards.

Q: Why is the capacitance specification different?

A: The BAV19TR specifies 5 pF capacitance compared to 1.5 pF for the BAV19-TAP. In high-frequency applications or circuits sensitive to junction capacitance, this difference may affect performance. Low-frequency rectifier applications are typically unaffected.

Q: Is the BAV19TR suitable for automotive applications?

A: The provided specifications do not indicate AEC-Q101 automotive qualification for the BAV19TR. The BAV19-TAP carries explicit AEC-Q101 qualification. Automotive applications should use the BAV19-TAP unless the BAV19TR automotive qualification status is confirmed through the manufacturer.

Q: What is the recovery time significance?

A: Both devices specify 50 ns reverse recovery time, indicating identical switching speed performance. This parameter is critical for fast-switching rectifier applications and is equivalent between the two parts.